Yah, through the phone company. You can call to report harassing phone calls, but you'll have to fill out some stuff prob.
I used to live w/ two roommates in teh late 90's. We had a young friend who was divorcing his wife and living with us during the nighttime. We got call block, and would block her calls (up to 6 numbers) but she must've had a lot of friends, b/c she could still call from their houses, so I called and reported harassing phone calls from her, but they sent out paperwork and sh!t to fill out so I said the hell with it.